Abstract
Abstract Sowing date and sowing method can have a profound influence on the productivity of alternative crops like camelina in semiarid agroecosystems. The objective of this study was to determine the effects of sowing date, sowing method, and cultivar on morphology, phenology, grain yield, oil concentration, oil, and biodiesel production of camelina. A 2‐year study was carried out at the University of Nevada, Reno Main Station Field Laboratory, during the spring to early summer of 2016 and 2017. Treatments were two sowing dates ( SD ) of 18 March 2016 (early SD ) and 17 April 2016 (late SD ) in Year 1 and 11 April 2017 (early SD ) and 11 May 2017 (late SD ) in Year 2. The change in SD in the second year was due to the excessively wet field condition preventing land preparation and sowing. There were two sowing methods ( SM ) imposed (broadcast and drill) and three cultivars of camelina (Blaine Creek, Columbia, and Pronghorn) arranged in a 3 × 2 × 2 factorial in a randomized complete block design experiment with four replications. Responses were considered different if p < 0.05. Grain yield of camelina was influenced by SD in Year 1 and SD × SM interaction in Year 2. In Year 1, grain yield was greater for early (921 kg/ha) compared to late SD (503 kg/ha, SE = 101). In Year 2, for early SD grain yield was not different between SM (average = 594 kg/ha), but for late, it was greater for drill (676 kg/ha) than broadcast (130 kg/ha, SE = 75). For broadcast SM , grain yield was greater for early (587 kg/ha) compared to late SD (130 kg/ha, SE = 75), but for drill SM , grain yield was not different between SD (average = 639 kg/ha). Oil concentration was affected by SD in both years, and in Year 1, for example, it was greater for early (295 g/kg) versus late SD (284 g/kg SE = 2.7). Both oil and biodiesel production followed a similar pattern to grain yield in this study. Based on the magnitude of differences observed in both years of this study, late SD and broadcast sowing are not viable options for farmers who want to venture into camelina production in Nevada.
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Claims 9
Claim · model-written summary
Early sowing gave greater camelina grain yield than late sowing in Year 1 (921 vs 503 kg/ha).
CamelinaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“Treatments were two sowing dates ( SD ) of 18 March 2016 (early SD ) and 17 April 2016 (late SD ) in Year 1”
e1“In Year 1, grain yield was greater for early (921 kg/ha) compared to late SD (503 kg/ha, SE = 101)”
Claim · model-written summary
Under late sowing in Year 2, drill sowing gave greater camelina grain yield than broadcast sowing (676 vs 130 kg/ha).
- Treatment
- drille0
- Outcome
- grain yielde0
- Direction
- greatere0
- Value
- 676 kg/hae0
- Qualifier
- for latee0
- Comparator
- broadcaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“In Year 2, for early SD grain yield was not different between SM (average = 594 kg/ha), but for late, it was greater for drill (676 kg/ha) than broadcast (130 kg/ha, SE = 75)”
Claim · model-written summary
In Year 2, grain yield under early sowing did not differ between sowing methods (average 594 kg/ha).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“In Year 2, for early SD grain yield was not different between SM (average = 594 kg/ha), but for late, it was greater for drill (676 kg/ha) than broadcast (130 kg/ha, SE = 75)”
Claim · model-written summary
Oil concentration was affected by sowing date in both years; in Year 1 it was greater under early than late sowing (295 vs 284 g/kg).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“Oil concentration was affected by SD in both years, and in Year 1, for example, it was greater for early (295 g/kg) versus late SD (284 g/kg SE = 2.7)”
e1“Treatments were two sowing dates ( SD ) of 18 March 2016 (early SD ) and 17 April 2016 (late SD ) in Year 1”
Claim · model-written summary
Late sowing and broadcast sowing are not viable options for farmers producing camelina in Nevada.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“Based on the magnitude of differences observed in both years of this study, late SD and broadcast sowing are not viable options for farmers who want to venture into camelina production in Nevada”
Claim · model-written summary
Oil and biodiesel production followed a similar pattern to grain yield.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“Both oil and biodiesel production followed a similar pattern to grain yield in this study”
Claim · model-written summary
Under broadcast sowing, grain yield was greater with early than late sowing (587 vs 130 kg/ha).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“For broadcast SM , grain yield was greater for early (587 kg/ha) compared to late SD (130 kg/ha, SE = 75)”
Claim · model-written summary
Under drill sowing, grain yield did not differ between sowing dates (average 639 kg/ha).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“but for drill SM , grain yield was not different between SD (average = 639 kg/ha)”
Claim · model-written summary
Grain yield of camelina was influenced by sowing date in Year 1 and by the sowing date by sowing method interaction in Year 2.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“camelina cultivars”
e0“Grain yield of camelina was influenced by SD in Year 1 and SD × SM interaction in Year 2”
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See all 10 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.